177 results about "Surface measurement" patented technology

The invention relates to the technical field of precise geometric quantity measurement, and discloses an electronic component size and contour automatic metering method, which comprises the following steps: calculating a nominal truncation phase distribution diagram of a to-be-measured electronic component by using a virtual projection imaging model, controlling a projection unit to project a single-frequency sine stripe grating to the electronic component and collecting a deformed stripe image, calculating the gradient of the modulation degree distribution map and extracting edge contour features to solve the actual pose of the assembly; performing modulo 2pi differential operation on the nominal and actually measured truncated phase distribution maps, and eliminating high-gradient artifacts by using an edge mask to generate a phase residual map; and converting the phase residual image into a height deviation distribution diagram according to the phase height mapping relation, and by constructing a phase domain differential metering channel, the phase unwrapping ambiguity in discontinuous surface measurement is avoided.

A Beidou / GNSS-based real-time high-precision sea surface measurement method and a buoy, wherein by using free-to-use broadcast ephemeris freely broadcast by GNSS satellites, precise point positioning of China's Beidou satellites, and other high-precision service space signals, real-time centimeter-level element information comprising time, longitude, latitude, water level, wave height, wave period, wave direction, sea surface current velocity and direction, atmospheric water vapor content, and the like can be directly obtained. The information can be stored locally in a buoy or transmitted back by communication, and is suitable for real-time high-precision sea surface measurements in offshore and far-sea scenarios.

The invention discloses a novel symmetric iteration nearest point cloud registration calculation method for quality detection, and the calculation method comprises the steps: setting a point set and a point set in a three-dimensional space, carrying out the registration of a point set P and a point set Q, so as to solve a six-degree-of-freedom rigid body transformation matrix, and carrying out the registration of the point set P and the point set Q; the six-degree-of-freedom rigid body transformation matrix comprises a three-degree-of-freedom rotation matrix R and a three-degree-of-freedom translation vector t; a weighted point-surface model is constructed, and a symmetric iteration nearest point objective function based on weighted point-surface measurement and an adaptive robust loss function is constructed based on the weighted point-surface model; the calculation of the symmetric iteration nearest point objective function based on the weighted point-surface measurement and the adaptive robust loss function comprises the step of alternately executing a corresponding point updating step and a registration step until a convergence condition is met.

The invention relates to the technical field of underground medium density inversion, in particular to an underground medium density inversion method and system based on high-precision microgravity, and the method comprises the steps: obtaining the gravity data of each observation point in an underground medium density inversion ground surface measurement region; calculating a superposition abnormal value of each gravity subsequence of each observation point, extracting a superposition characteristic value of each modal component, obtaining the superposition interference confidence of each gravity subsequence of each observation point, obtaining the superposition influence persistence of each observation point, adjusting the wavelet threshold of the wavelet transform of the gravity data on each observation point, and calculating the superposition abnormal value of each gravity subsequence of each observation point. And correcting the gravity data of each observation point after denoising processing to extract Bouguer gravity anomaly of each observation point, and obtaining an inversion result of the underground medium density through a Parker-Oldenburg density interface inversion algorithm. According to the method, the underground medium density can be effectively and accurately inverted through the high-precision microgravity data.

The invention relates to a laser interference surface type measurement method using random mechanical disturbance for resolving. The method comprises the following steps: acquiring an interference image of a measured element by using a surface type measurement device based on laser interference; applying random mechanical disturbance to the surface type measuring device to cause the change of the relative pose between the reference mirror and the measured element so as to acquire N frames of interference images in different disturbance states; and processing the acquired interference images through a natural phase decoding algorithm to obtain the surface topography of the measured element. Compared with the prior art, high-precision measurement of the surface type of the measured element can be realized without vibration isolation equipment and a high-precision phase shifter, and the method has the advantages of low cost, low system complexity and high adaptability.

The invention discloses a three-coordinate measuring machine based on special-shaped surface measurement. An upper working surface where a working table is located is used for bearing a to-be-measured piece; the measuring mechanism is arranged on the moving portal frame, the moving portal frame is made to move on the workbench, and a to-be-measured piece is measured through the measuring mechanism. A measuring head of the measuring mechanism is arranged at the front end portion where the first movement assembly is located, meanwhile, a first air bag pushing piece is arranged at the rear end portion where the first movement assembly is located, and the first air bag pushing piece is inflated and deflated to be matched with a measuring head piece at the front end portion to synchronously achieve axial pivoting movement. And the second movement assembly is located above the first movement assembly, so that the pivoting movement of the first movement assembly and the second movement assembly drives the measuring head piece to move in the whole space direction, and the full-angle scanning measurement of the to-be-measured piece by the measuring head piece is formed. The whole device can realize high-precision measurement of small-size measurement pieces, and the measurement efficiency is improved.

The invention discloses a method for measuring the number of layers of a two-dimensional material by utilizing Goos-Haenchen displacement, which comprises the following steps: establishing a Goos-Haenchen displacement theoretical database when a horizontal polarized light beam is reflected on the surfaces of the two-dimensional materials with different layers at different incident angles according to a theoretical relation model of the two-dimensional materials with different layers and the Goos-Haenchen displacement; enabling the horizontal polarization incident light beam to be incident to the surface of the measured two-dimensional material at a certain incident angle; measuring Goos-Hanchen shift generated by the reflected light beam under the condition; sequentially changing the incident angles to obtain a group of Goos-Hanchen shift measurement data under different incident angles; and comparing and analyzing the measured data with theoretical data in a Goos-Hanchen shift theory database to obtain the number of layers of the measured two-dimensional material. Compared with a traditional two-dimensional material layer number measuring method, such as a Raman spectrum method, an atomic force microscopy method and a transmission electron microscope method, the method is easy to operate and high in measuring efficiency, does not damage a sample and has a good application prospect.

The application belongs to the technical field of three-dimensional measurement, and particularly discloses a metal surface measurement method and system based on photometric stereo and binocular structured light. The method comprises the following steps: acquiring original depth point cloud of a mirror surface region of a surface to be measured by using a binocular camera; acquiring complete normal vector data of the surface to be measured by using a photometric stereo method; and fusing the original depth point cloud and the normal vector data to calculate surface point cloud of the surface to be measured. The measurement data of the binocular structured light and the near-field photometric stereo are combined, the missing measurement data of the metal surface caused by the mirror reflection is complemented, the mutual fusion of the height data and the normal vector data is utilized, and the accuracy of surface reconstruction is improved.

The invention discloses hot galvanizing furnace nose wallboard spraying equipment, and relates to the field of electric arc spraying, the hot galvanizing furnace nose wallboard spraying equipment comprises a wallboard clamping device, a three-axis positioning device located on one side of the wallboard clamping device, and an electric arc spraying device and a plate surface measuring device which are symmetrically arranged at the execution end of the three-axis positioning device. The spraying equipment can automatically plan and realize intermittent jumping spraying, and the risk of microcracks of a coating due to thermal stress is effectively avoided; according to the scheme, a control center serves as a core, wall plate clamping, three-axis positioning, curved surface measuring and electric arc spraying devices are dispatched in a unified mode, and whole-course automatic operation from plate body clamping, posture correction, contour scanning to final spraying is achieved.

This invention discloses a method for quality assessment of propeller blades based on regional difference partitioning. The steps are as follows: triangulate the initial surface of the propeller CAD model and extract the vertex set and its neighborhood feature set; analyze the geometric topology information of the vertex set's neighborhood to calculate vertex curvature features and extract seed point sets; calculate the surface vertex feature voting attributes based on the vertex set; perform regional energy clustering segmentation based on feature voting based on the seed point set; plan local measurement points based on the surface measurement area; perform chord tolerance sampling on each measurement point set to extract the locally optimal registration point set; perform nonlinear region accuracy hierarchical registration based on the locally optimal measurement point set and the vertex set; perform quality assessment based on propeller measurement standards according to the registration results; and output processing guidance data in a tabular format based on the quality assessment results. This invention solves the problems of insufficient measurement point description, low registration accuracy, and poor adaptability in the current propeller blade surface quality assessment stage caused by regional surface shape differences.

The invention provides a double-state interference morphology measurement method and system for a discontinuous precision surface, and belongs to the technical field of optical precision measurement. Based on a Fizeau interferometer, interference images in a focusing state and an out-of-focus state are respectively acquired, two-dimensional structure information and height information of a sample with a discontinuous precise surface are respectively extracted, and two-state data fusion is carried out, so that three-dimensional morphology reconstruction is realized. The method breaks through the limitation of the optical diffraction limit on the resolution, avoids the failure problem of a traditional phase unwrapping algorithm at a discontinuous boundary, remarkably enhances the environmental interference resistance, improves the calculation efficiency, is suitable for high-precision surface measurement of a vacuum chuck and the like with a large number of discontinuous characteristics, and has a wide application prospect. And a reliable solution is provided for high-end manufacturing quality control.

The invention relates to a method for measuring an ablated surface of a reentry capsule based on three-dimensional scanning, solves the problem of measuring the ablated surface of the reentry capsule, and belongs to the technical field of three-dimensional scanning. According to the method, a three-dimensional scanning measurement unit composed of a handheld laser tracker and a visual target is adopted, 360-degree surface ablation morphology data of the reentry capsule are spliced in a unified space reference based on a structured light scanning global positioning splicing technology, and a digital stereoscopic model of the reentry capsule is constructed; and extracting a theoretical three-dimensional model of the reentry capsule, positioning the scanning point cloud of the reentry capsule structure to the theoretical three-dimensional model of the reentry capsule structure through profile fitting, and realizing measurement of the ablation surface of the reentry capsule structure based on point cloud comparison.

This invention provides a three-dimensional measurement method for the surface of a moving object on a production line based on phase-shifting profilometry. Employing a three-dimensional vision measurement system composed of a projector and a camera, and based on the measurement principle of phase-shifting profilometry, the method analyzes the phase error caused by the motion of the measured object and proposes a three-dimensional measurement method for the surface of a moving object that does not require phase error correction. By setting the installation position and angle of the projector and camera, the phase encoding direction in the projected stripe pattern is perpendicular to the direction of motion of the measured object, thereby eliminating the phase error caused by motion. This allows the three-dimensional surface measurement results of the measured object under motion conditions to essentially achieve the measurement accuracy of the measured object under static conditions, realizing high-precision online real-time measurement of the surface three-dimensional morphology of moving objects on actual production lines.

The invention relates to the technical field of optical precision measurement, in particular to a flexible multi-module expandable optical measurement and detection device, which comprises a multi-camera module, a calibration object setting module, a threshold setting module, a calibration module, an image processing module and a measurement calculation module, and is characterized in that the multi-camera module which can be freely arranged is utilized to realize flexible expansion of a hardware level; and through cooperative judgment of the threshold setting module and the calibration object setting module, the calibration module is driven to intelligently select an optimal calibration strategy: efficient hand-eye calibration is adopted for a conventional baseline, a laser tracker is adopted for direct calibration for a large-size non-public field of view, and a three-dimensional standard part is adopted for spatial parameter joint optimization for different-plane measurement. The problems that traditional contact type measurement is poor in flexibility and high in cost, and a fixed visual system is difficult to adapt to a large base line and a complex space relation are solved, and efficient and universal measurement of the size and form and location tolerance of a complex workpiece is finally achieved while high precision is guaranteed.

The invention discloses a cylindrical battery measurement method based on machine vision, which comprises a double-line scanning correlation system, the double-line scanning correlation system comprises a top surface camera and a bottom surface camera, and the measurement method comprises the following steps: S100, the top surface camera collects a cylindrical battery top surface depth map, and the bottom surface camera collects a cylindrical battery bottom surface depth map; s200, intercepting a point set of a predetermined area of the top surface of the cylindrical battery as a top surface measurement point cloud, and intercepting a point set of a predetermined area of the bottom surface as a bottom surface measurement point cloud; s300, importing a predetermined calibration matrix T, and transforming the top surface measurement point cloud and the bottom surface measurement point cloud into the same coordinate system; and S400, respectively fitting the plane equation of the top surface measurement point cloud and the plane equation of the bottom surface measurement point cloud in the same coordinate system to calculate the distance between the top surface and the bottom surface so as to obtain the height dimension of the cylindrical battery. Manual direct measurement is avoided, measurement is achieved through computer vision, and the measurement reliability is improved.

The application provides a large-batch reflective plane surface automatic measurement method, and relates to the technical field of surface measurement, which comprises the following steps: constructing a binocular phase deflection measurement system, collecting multiple phase shift fringe images of a plurality of to-be-measured parts based on the binocular phase deflection measurement system; respectively performing phase calculation on the collected fringe images to determine the position corresponding relationship between the camera pixel points and the screen pixel points of the two cameras; extracting the corresponding effective areas of the plurality of to-be-measured parts according to the fringe change conditions of the fringe images collected by the two cameras; establishing the corresponding relationship between the effective areas and the to-be-measured parts in the two cameras according to the constraints of the polar lines and normal vectors, fitting the predetermined positioning plane of the to-be-measured parts based on binocular vision; performing calculation based on the predetermined positioning plane to obtain the normal vector direction of the surface of the to-be-measured part, and integrating and calculating the surface shape according to the normal vector direction of the surface of the to-be-measured part. The application effectively solves the demand of large-batch detection of the surface shape of the reflective plane device.

The present invention relates to a method (100) for painting a surface (50) of an object using a robot system (1), the robot system comprising a painting head (11), wherein the painting head comprises a nozzle arrangement (14) with a set of nozzles (16) for depositing paint (30) and a surface measuring system (18) configured to detect the surface, wherein the method comprises: controlling (110) the surface measuring system to detect a presence of the surface within a predefined range (29); and responsive to the detected presence of the surface, controlling (130) the nozzle arrangement to deposit paint at the detected surface.

The utility model relates to the technical field of paint surface measurement, and discloses a Bluetooth-connected paint surface coating thickness measuring device, which comprises a springback mechanism, an outer shell, a paint surface measuring module arranged in the outer shell and a probe monitoring assembly electrically and fixedly connected to one side of the paint surface measuring module. The protection assembly comprises a sleeve connected to the outer portion of the outer shell in a threaded mode, a bearing frame fixedly connected to the interior of the sleeve, and an amplification assembly fixedly connected to one end of the bearing frame. According to the utility model, after the sleeve and the external thread groove at one end are spirally taken down, the bearing bracket can be driven to be separated from the elastic abutting of the probe monitoring assembly along with continuous outward rotation of the sleeve, so that the probe monitoring assembly separated from the abutting limit of the bearing bracket can be elastically extended, and then the probe monitoring assembly is electrically contacted with the paint surface measuring module, and automatic starting of the device is realized; the detection use efficiency is improved.

The utility model discloses a handheld contourgraph measurement auxiliary tool which comprises a contourgraph body, a laser measurement assembly used for emitting laser and measuring the surface of an object is installed on the contourgraph body, and an installation rod is movably installed on the top of the contourgraph body. The mounting rod and the contourgraph body are rotationally arranged, a connecting rod is rotationally mounted at the top of the mounting rod, a handheld rod is rotationally mounted at the end, away from the mounting rod, of the connecting rod, the mounting rod, the connecting rod and the handheld rod form an auxiliary frame, and the auxiliary frame and the contourgraph body are disassembled and assembled. The contourgraph is used for improving the convenience of the contourgraph body, all-directional rotation of the contourgraph body is achieved by driving the contourgraph body to rotate on the X and Y faces, the Z and Y faces and the Z and X faces, and all-directional measurement and use of the auxiliary frame and the contourgraph body on the surface of an object can be facilitated.

This invention relates to the field of measurement platform technology, specifically a measurement platform with a leveling system, comprising: a base, a support frame fixed to the surface of the base, an adjustment seat provided on the surface of the support frame, a flip plate provided on the surface of the adjustment seat, a fixing ring provided on the surface of the flip plate, a first crossbar inserted into the end of the flip plate, a second crossbar fixed to the other end of the first crossbar, a nut provided on the surface of the second crossbar, a horizontal plate provided on the surface of the second crossbar, a connecting rod fixed to the end of the horizontal plate, and a pressing block provided at the other end of the connecting rod; the beneficial effect is that after the horizontal plate is pushed by the nut, it moves against the direction of the adjustment seat, and the horizontal plate drives the pressing block to move through the connecting rod, and the pressing block presses down on the surface of the force-bearing rod, so that the two sets of force-bearing rods drive the flip plate to stabilize on the surface of the adjustment seat, and the position of the fixing ring can also be stabilized when the measuring instrument is fixed on the surface of the fixing ring.

The application discloses a snowmelt runoff prediction method and system based on direct measurement of snow water equivalent, and belongs to the technical field of hydrological monitoring. The system comprises a cooperative observation network composed of an acoustic source array emitting coded acoustic waves and a sensing optical fiber laid on the ground surface; a distributed optical fiber acoustic wave sensing demodulator for receiving a snow layer modulated vibration signal; a fusion inversion calculation unit adopting a physical information neural network algorithm, embedding an acoustic wave fluctuation equation as a constraint into network training, and directly inverting a continuous spatial distribution of the snow water equivalent from the signal; and a runoff prediction module for predicting runoff by using the distributed data. The application breaks through the limitations of traditional point measurement and satellite remote sensing, realizes direct, high-resolution and high-precision surface measurement of the snow water equivalent, fundamentally improves the input data quality of the snowmelt runoff prediction model, and has the characteristics of high precision, strong reliability and cost-effectiveness.

Systems, methods, and apparatuses include a health parameter detection apparatus. The apparatus includes a platform having a measurement surface, the measurement surface being a first surface. The measurement surface is operable to contact a target area of a user. The apparatus includes one or more light sources disposed proximate to a transparent material and operable to transmit light into the transparent material. The apparatus further includes an internal mirror forming a first angle with the measurement surface and / or a camera such that the camera is operable to receive scattered light caused by frustrated total internal reflection (FTIR) occurring on the measurement surface and reflected from the mirror. The platform can form a portion of at least one of a treadmill, an elliptical machine, a rowing machine, a stair-stepper, or a leg press machine.

This invention discloses a visibility estimation method and apparatus based on binocular vision. The method includes: simultaneously acquiring left and right views using a calibrated binocular camera; inputting the image pairs into a stereo matching deep neural network to obtain a disparity map and converting it into a depth map; inputting the left view and depth map into a dual-branch deep convolutional neural network to extract multi-scale features; fusing RGB features and depth features through a cross-modal feature fusion module; and finally outputting a visibility estimate through a feature aggregation and regression module. The apparatus includes a binocular image acquisition unit, a data processing and visibility estimation unit, and a result output unit. This invention solves the depth ambiguity problem of monocular vision by fusing binocular depth information and image appearance information, achieving high-precision, non-contact visibility surface measurement. It has the advantages of low cost and flexible deployment, and is suitable for visibility monitoring in traffic scenarios such as highways.

The invention, which relates to the technical field of device measurement, discloses a six-surface measurement cradle device comprising a clamp, a first driving mechanism and a second driving mechanism. The clamp is provided with a hollow area and is used for fixing a to-be-tested piece, and the to-be-tested piece is opposite to the hollow area and is arranged on one side of the hollow area; the first driving mechanism is in transmission connection with the clamp and can drive the clamp to turn over vertically upwards along the first axis, so that different side surfaces of the to-be-measured piece are used for being opposite to the measuring element and the bottom plate can face the light-emitting plate; and the second driving mechanism is in transmission connection with the first driving mechanism and can drive the first driving mechanism to overturn vertically upwards along a second axis, so that different side surfaces of the to-be-measured piece are used for being opposite to the measuring element, and the first axis is perpendicular to the second axis. According to the six-surface measurement cradle device provided by the invention, the measurement efficiency and accuracy are improved.

The invention discloses a calibration method of a tactile sensor and an object surface measurement method, and the method comprises the steps: determining a sensor contact point through a calibration needle; according to the calibration method for calibrating the initial pose of the mechanical arm and converting all subsequent poses into the initial pose of the mechanical arm, the influence of the initial absolute pose error of the mechanical arm and the absolute pose error of placement of a calibration base on the calibration result at the beginning of calibration is avoided, the normal vector detection precision of the surface of the sensor is improved, and when the tactile sensor with the irregular surface is calibrated, the calibration precision is improved. The normal vector positions of all positions of the surface of the tactile sensor are determined, sensor deformation caused in the manufacturing and using process can be corrected, or the tactile sensor with the irregular surface can be directly calibrated, finally, the surface of the sensor can be accurately modeled, and subsequent normal vector measurement is more accurate.

The utility model provides an automobile part detection tool, which belongs to the part detection field and comprises a threaded column, the threaded column is provided with a detection assembly used for rapidly detecting the size of a through hole of an automobile part, and the detection assembly is provided with a curved surface measurement assembly used for measuring a curved surface through hole. According to the utility model, through the detection assembly and the curved surface measurement assembly, when the device is used, the transparent measurement plate is tightly attached to a to-be-measured automobile part through hole, the threaded column is tightly attached to the arc-shaped inner surface of the through hole, and at the moment, the circle center position of the transparent measurement plate corresponds to the arc-shaped inner surface position of the through hole; then the diameter of the through hole can be measured through a plurality of circular measuring grooves and a first measuring ruler which are arranged on a transparent measuring plate, the transparent measuring plate is connected to a cylinder with threads, contact blocks are arranged in the through hole, and the plurality of contact blocks are tightly attached to the arc-shaped inner surface of the through hole under the action of springs; and comparing the sizes of the plurality of circular measuring grooves and the through holes to know the sizes of the through holes in the curved surface.

According to this polishing method, a first image of a first region and a second image of a second region in a surface of a workpiece (W) are generated by an imaging device (24) at a predetermined time interval during polishing of the workpiece (W); the film thickness at a measurement point (MP) on the surface of the workpiece (W) is measured during polishing of the workpiece (W); a rotation angle of the workpiece (W) per unit time is calculated on the basis of an inclination angle of a pattern on the first image, an inclination angle of a pattern on the second image, and the predetermined time interval; a time difference between a measurement time at which the film thickness at the measurement point (MP) was measured and an imaging time at which the second image was generated is calculated; and the coordinates of the measurement point on the surface of the workpiece (W) are determined on the basis of relative positions of the measurement point (MP) and a center point of the workpiece (W), the rotation angle of the workpiece (W) per unit time, and the time difference.

The application relates to the technical field of pipe detection, in particular to a double-shaft rotary surface measuring instrument applied to the inner and outer surface topography of a tubular piece, which comprises an L-shaped bottom frame and a concave top frame, the concave top frame is fixedly installed at the top end of the L-shaped bottom frame, a pretreatment mechanism is arranged in the L-shaped bottom frame, and a positioning frame with a concave structure is rotationally arranged at the opening end in the concave top frame. Through the cooperative matching of self-adaptive clamping, pretreatment operation and double-shaft scanning, the problems of great clamping difficulty, complex multi-directional scanning and limited measurement in the inner and outer surface detection of the tubular piece are solved, the surface topography detection with high efficiency and multi-specification compatibility is realized, and the double-shaft rotary surface measuring instrument is suitable for the detection requirements of small-diameter and complex tubular pieces in the field of precision machinery and the like.

This invention discloses a method for measuring the elevation of the lower roller of a leveling machine using a total station. The measurement process is as follows: fabricating a fixture; installing the first leveling machine on the base, setting up the total station with the fabricated fixture, and measuring the z-axis coordinates of both sides of the lower roller; measuring the z-axis coordinates of the elevation reference point; similarly measuring the z-axis coordinates of all the first, second, and third leveling machines; calculating the deviation between the measured value and the design value of the upper surface of the lower roller according to the drawings; calculating the thickness of the shims; adjusting the shims, and then re-measuring after adjustment. The purpose of this invention is to provide a method for measuring the elevation of the lower roller of a leveling machine using a total station. This invention, through the use of a total station and fabricated fixture, completes the elevation measurement of the lower roller of the leveling machine, solving the problem that a level cannot measure this elevation.